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php5  5.3.10
Defines | Functions | Variables
php_crypt_r.c File Reference
#include "php.h"
#include <string.h>
#include <signal.h>
#include "php_crypt_r.h"
#include "crypt_freesec.h"
#include "ext/standard/md5.h"

Go to the source code of this file.

Defines

#define MD5_MAGIC   "$1$"
#define MD5_MAGIC_LEN   3

Functions

void php_init_crypt_r ()
void php_shutdown_crypt_r ()
void _crypt_extended_init_r (void)
static void to64 (char *s, int32_t v, int n)
char * php_md5_crypt_r (const char *pw, const char *salt, char *out)

Variables

static unsigned char itoa64 [] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"

Define Documentation

#define MD5_MAGIC   "$1$"

Definition at line 111 of file php_crypt_r.c.

#define MD5_MAGIC_LEN   3

Definition at line 112 of file php_crypt_r.c.


Function Documentation

void _crypt_extended_init_r ( void  )

Definition at line 80 of file php_crypt_r.c.

{
#ifdef PHP_WIN32
       LONG volatile initialized = 0;
#elif defined(HAVE_ATOMIC_H) /* Solaris 10 defines atomic API within */
       volatile unsigned int initialized = 0;
#else
       static volatile sig_atomic_t initialized = 0;
#endif

#ifdef ZTS
       tsrm_mutex_lock(php_crypt_extended_init_lock);
#endif

       if (!initialized) {
#ifdef PHP_WIN32
              InterlockedIncrement(&initialized);
#elif defined(HAVE_SYNC_FETCH_AND_ADD)
              __sync_fetch_and_add(&initialized, 1);
#elif defined(HAVE_ATOMIC_H) /* Solaris 10 defines atomic API within */
              membar_producer();
              atomic_add_int(&initialized, 1);
#endif
              _crypt_extended_init();
       }
#ifdef ZTS
       tsrm_mutex_unlock(php_crypt_extended_init_lock);
#endif
}

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void php_init_crypt_r ( )

Definition at line 66 of file php_crypt_r.c.

{
#ifdef ZTS
       php_crypt_extended_init_lock = tsrm_mutex_alloc();
#endif
}
char* php_md5_crypt_r ( const char *  pw,
const char *  salt,
char *  out 
)

Definition at line 324 of file php_crypt_r.c.

{
       static char passwd[MD5_HASH_MAX_LEN], *p;
       const char *sp, *ep;
       unsigned char final[16];
       unsigned int i, sl, pwl;
       PHP_MD5_CTX   ctx, ctx1;
       php_uint32 l;
       int pl;
       
       pwl = strlen(pw);
       
       /* Refine the salt first */
       sp = salt;

       /* If it starts with the magic string, then skip that */
       if (strncmp(sp, MD5_MAGIC, MD5_MAGIC_LEN) == 0)
              sp += MD5_MAGIC_LEN;

       /* It stops at the first '$', max 8 chars */
       for (ep = sp; *ep != '\0' && *ep != '$' && ep < (sp + 8); ep++)
              continue;

       /* get the length of the true salt */
       sl = ep - sp;

       PHP_MD5Init(&ctx);

       /* The password first, since that is what is most unknown */
       PHP_MD5Update(&ctx, (const unsigned char *)pw, pwl);

       /* Then our magic string */
       PHP_MD5Update(&ctx, (const unsigned char *)MD5_MAGIC, MD5_MAGIC_LEN);

       /* Then the raw salt */
       PHP_MD5Update(&ctx, (const unsigned char *)sp, sl);

       /* Then just as many characters of the MD5(pw,salt,pw) */
       PHP_MD5Init(&ctx1);
       PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
       PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl);
       PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
       PHP_MD5Final(final, &ctx1);

       for (pl = pwl; pl > 0; pl -= 16)
              PHP_MD5Update(&ctx, final, (unsigned int)(pl > 16 ? 16 : pl));

       /* Don't leave anything around in vm they could use. */
       memset(final, 0, sizeof(final));

       /* Then something really weird... */
       for (i = pwl; i != 0; i >>= 1)
              if ((i & 1) != 0)
                  PHP_MD5Update(&ctx, final, 1);
              else
                  PHP_MD5Update(&ctx, (const unsigned char *)pw, 1);

       /* Now make the output string */
       memcpy(passwd, MD5_MAGIC, MD5_MAGIC_LEN);
       strlcpy(passwd + MD5_MAGIC_LEN, sp, sl + 1);
       strcat(passwd, "$");

       PHP_MD5Final(final, &ctx);

       /*
        * And now, just to make sure things don't run too fast. On a 60 MHz
        * Pentium this takes 34 msec, so you would need 30 seconds to build
        * a 1000 entry dictionary...
        */
       for (i = 0; i < 1000; i++) {
              PHP_MD5Init(&ctx1);

              if ((i & 1) != 0)
                     PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);
              else
                     PHP_MD5Update(&ctx1, final, 16);

              if ((i % 3) != 0)
                     PHP_MD5Update(&ctx1, (const unsigned char *)sp, sl);

              if ((i % 7) != 0)
                     PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);

              if ((i & 1) != 0)
                     PHP_MD5Update(&ctx1, final, 16);
              else
                     PHP_MD5Update(&ctx1, (const unsigned char *)pw, pwl);

              PHP_MD5Final(final, &ctx1);
       }

       p = passwd + sl + MD5_MAGIC_LEN + 1;

       l = (final[ 0]<<16) | (final[ 6]<<8) | final[12]; to64(p,l,4); p += 4;
       l = (final[ 1]<<16) | (final[ 7]<<8) | final[13]; to64(p,l,4); p += 4;
       l = (final[ 2]<<16) | (final[ 8]<<8) | final[14]; to64(p,l,4); p += 4;
       l = (final[ 3]<<16) | (final[ 9]<<8) | final[15]; to64(p,l,4); p += 4;
       l = (final[ 4]<<16) | (final[10]<<8) | final[ 5]; to64(p,l,4); p += 4;
       l =                  final[11]            ; to64(p,l,2); p += 2;
       *p = '\0';

       /* Don't leave anything around in vm they could use. */
       memset(final, 0, sizeof(final));
       return (passwd);
}

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Definition at line 73 of file php_crypt_r.c.

{
#ifdef ZTS
       tsrm_mutex_free(php_crypt_extended_init_lock);
#endif
}
static void to64 ( char *  s,
int32_t  v,
int  n 
) [static]

Definition at line 118 of file php_crypt_r.c.

{
       while (--n >= 0) {
              *s++ = itoa64[v & 0x3f];
              v >>= 6;
       }
}

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Variable Documentation

unsigned char itoa64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" [static]

Definition at line 114 of file php_crypt_r.c.